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Discontinuous Flow in Zinc Crystals and its Relationship to Strain Ageing

1954; IOP Publishing; Volume: 67; Issue: 2 Linguagem: Inglês

10.1088/0370-1301/67/2/302

1747-3837

M J Dumbleton,

High-Velocity Impact and Material Behavior

It was found that nitrogen-treated zinc crystals could strain-age under an applied stress, and also during creep provided the creep rate was small enough. A repeated yielding, strongly dependent on temperature and rate of strain, and which seemed to be due to strain ageing during flow, was observed in stress-strain tests. Jerky flow in stress-strain tests, and jerky stress-relaxation curves were observed over a much wider range of conditions, and appeared also to be due to the presence of nitrogen acting in some manner other than strain ageing.